Trane RTWB Helical-Rotary Installation Operation & Maintenance page 7

RTWB-SVN01B-E4
General
Information
Installation overview
For convenience, Table 1
summarizes responsibilities that are
typically associated with the RTWB
chiller installation process.
• Locate and maintain the loose
parts, for example, isolators, bulb
wells, temperature sensors, flow
sensors, or other factory-ordered,
field-installed options, for
installation, as required.
• Install the unit on a foundation
with flat support surfaces, level
within 6 mm and of sufficient
strength to support concentrated
weight. Place the manufacturer-
supplied isolation pad assemblies
under the unit.
• Install the unit per the instructions
outlined in the mechanical
installation section. Complete all
water piping and electrical
connections.
Note: Field piping must be arranged
and supported to avoid stress on
the equipment. It is strongly
recommended that the piping
contractor provide at least 1 m of
clearance between the pre-
installation piping and the planned
location of the unit. This will allow
for proper fit-up upon arrival of the
unit at the installation site. All
necessary piping adjustments can
be made at that time.
Where specified, supply and install
valves in the water piping upstream
and downstream of the evaporator
and condenser water boxes to
isolate the shells for maintenance
and to balance and trim the system.
•
Supply and install flow switches or
equivalent devices in both the
chilled-water and condenser-water
piping. Interlock each switch with
the proper pump starter and UCP2
to ensure that the unit can only
operate when water flow is
established.
• Supply and install taps for
thermometers and pressure
gauges in the water piping,
adjacent to the inlet and outlet
connections of both the
evaporator and the condenser.
• Supply and install drain valves on
each water box.
• Supply and install vents cocks on
each water box.
• Where specified, supply and install
strainers ahead of all pumps and
automatic modulating valves.
• Supply and install refrigerant
pressure-relief piping from the
pressure relief to the atmosphere.
• Start the unit under supervision of
a qualified service technician.
• Where specified, supply and
insulate the evaporator and any
other portion of the unit, as
required, to prevent sweating
under normal operating
conditions.
• For unit-mounted starters, cutouts
are provided at the top of the
panel for line-side wiring.
• Supply and install the wire
terminal lugs to the starter.
• Supply and install field wiring to
the line-side lugs of the starter.
7